大相对孔径长焦距同轴折反射式望远物镜设计  

Design of a Coaxial Catadioptric Telescope Objective with a Large Relative Aperture and Long Focal Length

作　　者：沈志娟 曹一青 Shen Zhijuan;Cao Yiqing(School of Opto-Electronic and Communication Engineering,Xiamen University of Technology,Xiamen,Fujian 361024,China;School of Mechanical and Electrical Engineering,Putian University,Putian,Fujian 351100,China)

机构地区：[1]厦门理工学院光电与通信工程学院,福建厦门361024 [2]莆田学院机电工程学院,福建莆田351100

出　　处：《激光与光电子学进展》2021年第1期150-155,共6页Laser & Optoelectronics Progress

基　　金：福建省自然科学基金项目(2020J01916);莆田市科技计划项目(2020GP004);福建省中青年教师教育科研项目(JAT190590,JAT190567);莆田学院科研资助项目(2019010)。

摘　　要：以双反射镜系统为基础,在其前后均增加一组折射光学元件来校正和平衡系统像差,设计了一款仅由2片反射镜和4片透镜组成的大相对孔径、长焦距且总长较短的折反射式望远物镜。该物镜系统的工作波段为400~700 nm,焦距为900 mm,入瞳直径为500 mm,遮拦比为0.43,系统总长为495 mm,全视场角范围内的调制传递函数值在截止频率为107.5 lp/mm处均大于0.5。最后对系统进行了公差分析。结果表明,设计的望远物镜系统具有结构简单、成像分辨率高且公差大等特点。To correct and balance aberrations found in current systems,we designed a catadioptric telescope objective with a large relative aperture,long focal length,and short total length by adding a set of refraction optical elements before and after a double-mirror system. The working band of the objective system is 400-700 nm,focal length is 900 mm,diameter of the entrance pupil is 500 mm,obstruction ratio is 0. 43,total length of the system is495 mm,and value of modulation transfer function in the full field-of-view range is more than 0. 5 at a cut-off frequency of 107. 5 lp/mm. Tolerance analysis of the system was conducted. The results show that the telescope objective system designed in this study has the characteristics of a simple structure,high imaging resolution,and large tolerance.

关 键 词：几何光学 望远物镜 大相对孔径 长焦距 折反射物镜 光学设计 

分 类 号：O435[机械工程—光学工程]